Printing mechanism.



C. WALES.

PRINTING MECHANiSM.

APPLiCAHON FILED A'PR. 3, 19:4.

Patented July 10, 1917.

SHEETS-SHEET] [TNESSES Y C WALES.

PRINTING MECHANISM.

APPLICATION FILED mus. 1914.

1,232,738. Patented July 10, 1917 4 SHEETSSHEE T 2.

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V [N VE NTOR C/mrZes Wales C. WALES.

. PRINTING MECHANISM.

APPLICATION FILED APR. 3, 1914.

Patnted July 10, 1917;

4 gains-swans.

. INVENTOR 6720/19.; Wale;

iV TNESSES C. WALES. PRINTING MECHANISM. APPLICATHJN FILED APR. 3,1914.

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mrnntr OFFICE.

CHARLES WALES, OF NEW HAVEN, GONNEC MACHINE COMPANY, OF NEW HAVEN,

TICUT, ASSIGNOR TO THE WHITE ADDING CONNECTICUT,'A CORPORATION OF CON- ]?RINTING- MECHANISM.

Specification of Letters Patent.

Patented July 10, 1917.

Application filed April 3, 1314. Serial No. 829,197

To all 10 from, it may concern:

Be it known that I CHARLES "Wants, citi" zen of the United ta'tes, residing at New Haven, county of New Haven, State of Connecticut, have invented certain new and useful Improvements in Printing Mechanism, of which the following is a full, clear, and exact description.

My invention relates to improvements in printing mechanism for computing machines and has for its obect to produce a printing mechanism in which the hammers act upon anyone of a series of type members, the hammer and type members being so guided that at the moment of impact, the hammer 'will strike the type member squarely; It

further has for its object to provide means whereby the ready re-coil of the hammer after impact is permitted.

"he following is a description of an embodiment of my invention, reference being bad to the accompanying drawings, .in which, i

Figure 1 shows the printing mechanism in side elevation.

Fig. 1 is a detail (on double scale) of one of the springs when the parts are in the positions shown in Fig. 1.

ings, A is a metal frame Fig. '2 is a longitudinal section of the apparatus on an enlarged scale, showing one of the hammers-in retracted or cocked position.

Fi 3 is a sectional view showingdetails of the links for lifting the type carrier and their relation to hammer-lock lifters.

Fig. lis a front view of the guide plate for'the type members and hammers.

Fig. 5 isa horizontal section on the line (Fig. 1) showing detailsv of certain parts, other parts being omitted.

Fig. 6 is another detail on the line 6-6 (Fig. 1). i Y

Referring more particularly to the drawsupporting a platen A,,a channeled plate B and a'shaft D" for the levers D which position the type memhers. Carried bythe-plate B there are two side members C 'of the hammer mechanism. In each of the channels of the member B is a guide rod D carrying at its wpper end type members D, whose rear typefaced ends D are adapted to strike against the and whose front ends are to be hit by the hammers. The guide rods D are held within the channels B in the plate B by a retaining pl when A plate The type members are surrounded by housings D" which housings are respectively secured to their guide rods D. The type members are providedwith slight vertical extensions D which engage the front face of the housing so as to limit the forward movement ofthe type members within the housing' The type members are provided with recesses in which are located helical springs D which at their rear ends bear against the-rods D so as to tend to move the type members away from the platen.

Upon a shaft F carried by the members C, is loosely mounted a series of hammers F, struck from sheet metal and having no projecting hubs. Upon said shaft F and separating the hammers, is a series of spacing rings F The hammers are provided with forwardly projectin lever arms F each having a. notch F, with which engages a restraining bail F, forming a part of a lever loosely mounted upon the connecting bolt C.

Upon said shaft F' are also carried two bell cranks F rigidly connected thereto and between the lower ends of whichis a cross bar F adapted to engage with the lever arms F. Gonnected to the upper end'of one of the bell cranks F is a forwardly extending connccting rod F having a. slot in its forward end, which engages a stud upon the upper end of the lever F carrying the bail F Upon the cross bolt F is shown one of a series of locking t1iggers,"F- each having a,

tooth F adapted to engage the projection r on F upon the shank of the corresponding hammer F. These locking triggershave the usual over-lapping fingersF each engaged by the trigger to the left, by which movement s transmitted from one of said locks to the next to the right. .Springs F connect the rear ends of the triggers F 'with a suit able abutment F in this case on the front portion of a guii'lc plate F hereafter described. at length, and tend to keep the teeth F of the triggers in depressed position.

Upon a cross rod F to the rear of the cross. rod F is a series of hammer lock lifters F, the rear ends of which tend to riseby reason of the springs F connected thereto and to the cross plate F carried'by the frames C. To the front end of the lever nrins F of the hammers are connected one end of springs F the other end being eon nected to {date Fi carried by sliding mem bers F which ride upon the cross bars F their upper ends being guided between the cross rod (x and the frontemls 0f the guide plate W". This guide plate F is shown in detail in Fig. 4 and is provided with lateral projections F by which it is secured to the lateral plates C. This guide plate F is provided with slots l" for thej-iront ends of the type members and with slots l 'for the stems or shanks of' the hammers F. The slots F constitute guides for the hammers at points remote from the shaft onwvhich the hanuners are mounted. The lower ends of the slot W" are slightly enlarged so as to make it easier for the ends of the type members to enter therein. The slots F are directly in line with the slots 1 and are separated therefron'i by dividing portions I"'-' so as to increase the rigidity of the central portion of the plate. The slots F are slightly wider than the slots F" to accommodate the ends of the type members which are slightly widerthan the thickness of the rear end' of the hammer F.

The lifting links D" are provided with projections D which engage'the rear ends of the hammer lock releasers F and hold them out of oymration when thelifting links I)" are in deynessed position.

The guide plate F" with its slots F positions the trout ends of the type members at the time the hammer I makes impact therewith and the slots F guide, the hammers F at points remote from the shaft on which they are mounted, so that their striking points make a true blow upon the front ends of thetypemembers. thus insuring accuracy in the'blow of the hammer which is of great importance in producing a proper impression upon the paper carried by the platen. r The spring I? is shown in Fig. l in the position it assumes, while the hammer is in engagement with one of its type members. The spring 25 is of such length'that when the hammer is in this position, its active coils bear against each otheras shown in Fig. 1 so that it is slack and no longer exerts any pulling etl'ort, the total length oi? the contracted spring being such as to entirely relieve the strain thereon at the instant the hammer causes the type member to strike the platen. This permits the instantaneous rebound of the hammer from the platen after the stroke has been made, thus insuring the rebound of the hammer without the use of additional devices as expedients.

The rings F and the hammers fit so closely together upon the shaft; l as to provide for-the movement of oil by capillary action between the adjacent faces of these parts and'along the shaft F from one end of the series of bearings and rings to the otier end of said series so that when oil isv applied to one portion of said series, the-oil.

will travel through the remaii'ider of said series; with the result thatwhen oil is consumed faster at one portion of said series (the portion most used) the oil will travel from the. other portions into theportion where there is the least oil. i

The confining of the upper portions of the hammer stems in the slots insures an accu rate movement of thehannner during its stroke. notwithstmidiug lack of precision .in the fitting of the hammer hearing about the roek shat't I and with reference to the spacing rings I The accuracy thus obtained permits the us of sheet metal hammers which do not have projecting hubs aml the forming of these parts by ordinary min-lune metbodsand thereafter assen'ibling them without fitting, saving the labor and expense in manuizwture and leading to darability after nuuml'acture.

I The confining of the type stems in the slots 1 leads to the precise positioning and movementof the type. This avoids the lateral turning of the type bar housin; and the type bars on account of loose'ness in the litting and the guiding of the type and the hammer in the manner described, insures the bringing ol the type stem and'lnumner into the same plane at the moment of impact, so that the hanuner stroke is made ac curate and eli'eetive, there being the least possible side. thrusts from the blow.

The general. operation ot the mechanism is well malerstood by those skilled in the art. The levers are OJerated so as to raise the links I)" and position the. type bars l)" according to the mnnber to be set up, the hannners having been retractedby the dmvuward movement of the bar F, brought about by the movement of the shaft F. Alter the type bars have been set up, the shaft l is rotated in a counter clockwise di rcrtion. (Fig. 1) and ra sing of the harl" puts the springs i under the teusiom the bar l moving upward so as to be livee from the lower ends of the hammer levers which i are held restrained by the bail F actuated by the spring F and in the notch F". \Vhen thesprin'gs I have been placed under sullicient tension-the. forward end of the link F" withdraws the bail F releasingthe hammers. whose locking triggers have been withdrawn. These locking triggers are. controlled in part by the lugs D upon the links D". as will. be well understoot l. \Vhen any hannner lock is relea'sed. all lnunmer-ltmks to the right thereol will also be released, each hammer-loek acting upon the tail piece W" of the hammerlock to its right to withdraw it from holding position.

lvbat'l, claim is:

il. in a mechanism ol the nature described, a combination with a platen Of vertically movable type-supporting rods, a plurality of type members borne by each of said type supporting rods, a slotted stationary guide slots receiving the ends of said type members, a shaft. hammers loosely*mounted upon said shaft, and means for setting and firing said hammers, the lower portions of said slots being expanded, said type members being adapted to leave and enter said slots at their lower ends.

3. In a mechanism of the nature described,

a combination of .a platen, type-supporting rods, type members carried by said type supporting rods, a guide plate having a rear series of slots guiding said type members, and a front series of slots, the slots of each series conforming in number to the number of typesupporting rods, a shaft, hammers loosely surrounding" said shaft and extending through the front row of said slots and means for setting and firing said hammers. 4. In a mechanism of the nature described, the combination of a platen, a guide plate having a forwardly extending portion provided with a forward series of slots and an upwardly extending portion havin a rear series of slots which extend somewIiat into said forwardly extending portion and are in alinement with the slots within said forwardly extending portion, vertically mov able type rods, type members carried thereby and positioned bythe rear slots in the vertical portion, and oscillating hammers guided by the slots in the forwardly extending portion.

5. In a mechanism of the nature described, the combination of a'platen, a. guide plate having a vertically extending portion and also forwardly extending top and bottom portions and parallel slots beginning in said bottom portion and ending insaid upper portion, vertically movable type-carrying rods, a'vertical series of type members can rled thereby-and adapted to pass into and out of said slots, and hammers for striking said type members.

6. In a mechanism of the nature described,

the combination of a platen, a guide plate having a forwardly extending portion pro vided with front slots and an upwardly ex- Y tending portion having rear slots which extend somewhat into said forwardly extending portion and are in alinement with the front slots .within said forwardly extending portion, vertically movable type-carrying rods, type members carried thereby and positioned by the rear slots in the vertical por tion, and oscillating hammers positioned by the front slots in the forwardly extending portion, said. plate having at its upward end,

a forwardly extending portion into which the rear slots extend.

7. In a mechanism of the character described, the combination of a shaft, 0scil lating hammers mounted thereon and loosely' surrounding said shaft and having a narrow portion engaging therewith and spacing rings separate from said hammers and surrounding said shaft between said hammers and a. guide plate having slots for guiding the said hammers at points removed from said shaft.

8. In a mechanism of the character described, the combination of a. shaft, oscillating sheet metal hammers each of uniform tliicknessthroughout mounted thereon and loosely surroundingsaid shaft and spacing rings separate from said hammers and surrounding said shaft between said hammers and a (guide plate having slots for guiding the sai hammers at points near the heads of said hammers.

a CHARLES WALES. Witnesses:

EDWARD S. SWIFT, Anon: M. JACOBSON. 

